JP2012189776A - Projector - Google Patents

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JP2012189776A
JP2012189776A JP2011052764A JP2011052764A JP2012189776A JP 2012189776 A JP2012189776 A JP 2012189776A JP 2011052764 A JP2011052764 A JP 2011052764A JP 2011052764 A JP2011052764 A JP 2011052764A JP 2012189776 A JP2012189776 A JP 2012189776A
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liquid crystal
adjustment member
optical compensation
pair
crystal panel
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JP5790037B2 (en
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Fumio Yuzawa
史夫 湯澤
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Seiko Epson Corp
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Seiko Epson Corp
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  • Polarising Elements (AREA)
  • Projection Apparatus (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of finely adjusting a posture of an optical compensation element.SOLUTION: A projector 1 includes: an optical modulating device for modulating an incident light flux; an optical compensation element 6 for compensating the phase difference of the light flux through the optical modulating device; an adjusting member 7 to which the optical compensation element 6 is attached, and which adjusts a position of the optical compensation element 6; and a supporting member 8 for supporting the adjusting member 7. The adjusting member 7 has a pair of arms 72 projecting in directions separating from each other. The supporting member 8 has a pair of rising portions 821 and 823 respectively opposing to tip ends 721 of the pair of arm portions 72. On either one of the arms 72 or the rising portions 821 and 823, a projecting portion 722 which projects out toward the other and insertion holes 821A and 823A in which the projecting portion 722 is inserted are provided. An engaging structure is provided, which can rotate the adjusting member 7 to the supporting member 8 while the projecting portion 722 is inserted in the insertion holes 821A and 823A.

Description

本発明は、プロジェクターに関する。   The present invention relates to a projector.

従来、プロジェクターにおいて、投影画像のコントラストを向上させることを目的として、光変調装置の光入射側や光出射側に光学補償素子(位相補償板)を配設した構成が知られている(例えば、特許文献1参照)。
特許文献1に記載の技術では、光変調装置として、透過型の液晶パネルを採用している。
また、光学補償素子は、補償素子調整機構により、入射する光束の光軸に直交し、かつ、液晶パネルの縦方向及び横方向に対して傾斜した仮想線を中心として回転(姿勢調整)可能に配設されている。
Conventionally, in a projector, for the purpose of improving the contrast of a projected image, a configuration in which an optical compensation element (phase compensation plate) is disposed on a light incident side or a light emitting side of a light modulator is known (for example, Patent Document 1).
In the technique described in Patent Document 1, a transmissive liquid crystal panel is used as the light modulation device.
Further, the optical compensation element can be rotated (attitude adjustment) about a virtual line that is orthogonal to the optical axis of the incident light beam and is inclined with respect to the vertical and horizontal directions of the liquid crystal panel by the compensation element adjustment mechanism. It is arranged.

この補償素子調整機構は、光学補償素子を保持する板状の位相補償板金具と、位相補償板金具を回転可能に支持する出射偏光板金具とを備える。
位相補償板金具には、光学補償素子が固定される枠体部の外部から突出する2つの折り曲げリブが形成されている。
また、出射偏光板金具には、位相補償板金具を保持するための2つのV溝部が形成されている。
そして、位相補償板金具は、出射偏光板金具の各V溝部に2つの折り曲げリブが係止された状態で、出射偏光板金具に対して支持されるとともに、各折り曲げリブと各V溝部との各係止位置を結ぶ直線(上記仮想線)を中心として回転可能となる。
The compensation element adjusting mechanism includes a plate-shaped phase compensation plate bracket that holds the optical compensation element, and an output polarizing plate bracket that rotatably supports the phase compensation plate bracket.
The phase compensation plate bracket is formed with two bent ribs protruding from the outside of the frame body portion to which the optical compensation element is fixed.
In addition, two V-groove parts for holding the phase compensation plate metal fitting are formed in the output polarizing plate metal fitting.
The phase compensation plate metal fitting is supported by the output polarizing plate metal fitting in a state where the two bent ribs are locked to the respective V groove portions of the output polarizing plate metal fitting. It becomes possible to rotate around a straight line (the imaginary line) connecting the locking positions.

特開2010−54657号公報JP 2010-54657 A

しかしながら、特許文献1に記載の技術では、位相補償板金具は、各折り曲げリブが各V溝部に係止され、当該各係止位置を結ぶ直線を中心として回転(姿勢調整)されるため、回転時にV溝部に対して折り曲げリブがずれやすいものとなっている。
すなわち、位相補償板金具(光学補償素子)の回転(姿勢調整)時に、V溝部に対して折り曲げリブがずれた場合には、回転中心線(上記仮想線)がずれることとなり、光学補償素子の姿勢を良好に調整することができない、という問題がある。
However, in the technique described in Patent Document 1, the phase compensation plate metal fitting is rotated (posture adjustment) around each straight line connecting the respective locking positions, with each bent rib locked to each V-groove portion. Sometimes the bending rib is easily displaced from the V-groove.
That is, when the bending rib is displaced with respect to the V-groove during the rotation (posture adjustment) of the phase compensation plate (optical compensation element), the rotation center line (the imaginary line) is displaced. There is a problem that the posture cannot be adjusted well.

本発明の目的は、光学補償素子の姿勢を良好に調整できるプロジェクターを提供することにある。   The objective of this invention is providing the projector which can adjust the attitude | position of an optical compensation element favorably.

本発明のプロジェクターは、入射した光束を変調する光変調装置と、前記光変調装置を介した光束の位相差を補償する光学補償素子と、前記光学補償素子が取り付けられ、前記光学補償素子の位置を調整する調整部材と、前記調整部材を支持する支持部材とを備え、前記調整部材は、互いに離間する方向に突出する一対の腕部を有し、前記支持部材は、前記一対の腕部の先端にそれぞれ対向する一対の起立部を有し、前記腕部及び前記起立部のいずれか一方には、いずれか他方に向けて突出する突起部、及び前記突起部が挿通される挿通孔を有し、前記挿通孔に前記突起部が挿通された状態で前記支持部材に対して前記調整部材を回転可能とする係合構造が設けられていることを特徴とする。   The projector according to the present invention includes a light modulation device that modulates an incident light beam, an optical compensation element that compensates for a phase difference of the light beam that passes through the light modulation device, and the optical compensation element, and the position of the optical compensation element. An adjustment member that adjusts the adjustment member, and a support member that supports the adjustment member, and the adjustment member has a pair of arm portions protruding in a direction away from each other, and the support member includes the pair of arm portions. It has a pair of upright portions respectively opposed to the tips, and either one of the arm portion or the upright portion has a protruding portion that protrudes toward the other and an insertion hole through which the protruding portion is inserted. An engagement structure is provided that allows the adjustment member to rotate with respect to the support member in a state where the protrusion is inserted into the insertion hole.

本発明では、調整部材は、突起部及び挿通孔を有する上述した係合構造により、支持部材に対して回転可能に構成されている。すなわち、調整部材(光学補償素子)は、挿通孔に突起部が挿通された状態で、支持部材に対して回転(姿勢調整)することとなる。
このため、光学補償素子の姿勢調整時に、回転中心線がずれることがなく、光学補償素子の姿勢を良好に調整できる。
In the present invention, the adjustment member is configured to be rotatable with respect to the support member by the above-described engagement structure having the protrusion and the insertion hole. That is, the adjustment member (optical compensation element) rotates (posture adjustment) with respect to the support member in a state where the protrusion is inserted through the insertion hole.
For this reason, at the time of adjusting the attitude of the optical compensation element, the rotation center line is not shifted, and the attitude of the optical compensation element can be adjusted favorably.

本発明のプロジェクターでは、前記一対の起立部は、前記挿通孔に前記突起部が挿通された状態で弾性変形しながら前記一対の腕部にそれぞれ当接することが好ましい。
本発明では、一対の起立部が弾性変形しながら一対の腕部にそれぞれ当接するので、調整部材の回転時には、起立部及び腕部間に上記起立部の弾性変形等に応じた摩擦力が生じることとなる。
すなわち、調整部材は、当該摩擦力により、調整部材や光学補償素子の自重等によって不要に回転することが抑制される。このため、光学補償素子の姿勢を精度良く調整(微調整)できる。
In the projector according to the aspect of the invention, it is preferable that the pair of upright portions abut on the pair of arm portions while being elastically deformed in a state where the protrusion is inserted into the insertion hole.
In the present invention, since the pair of upright portions abut against the pair of arm portions while being elastically deformed, a frictional force corresponding to the elastic deformation of the upright portion and the like is generated between the upright portion and the arm portion when the adjustment member rotates. It will be.
That is, the adjustment member is prevented from rotating unnecessarily due to the weight of the adjustment member or the optical compensation element due to the frictional force. Therefore, the attitude of the optical compensation element can be adjusted (finely adjusted) with high accuracy.

本発明のプロジェクターでは、前記光変調装置は、液晶分子の配列状態を変化させることで入射した光束を変調する第1の液晶パネル及び第2の液晶パネルを備え、前記第1の液晶パネルは、前記第2の液晶パネルに対して、前記液晶分子のねじれ方向が異なる方向に設定され、前記調整部材は、前記第1の液晶パネルにおける前記液晶分子のねじれ方向に対応した第1の仮想線に沿って突出する前記一対の腕部を有し、前記第1の仮想線を中心として前記支持部材に対して回転可能とする第1の調整部材と、前記第2の液晶パネルにおける前記液晶分子のねじれ方向に対応した第2の仮想線に沿って突出する前記一対の腕部を有し、前記第2の仮想線を中心として前記支持部材に対して回転可能とする第2の調整部材とを備え、前記支持部材は、前記第1の調整部材及び前記第2の調整部材における各前記一対の腕部の先端にそれぞれ対向する4つの前記起立部を有することが好ましい。   In the projector according to the aspect of the invention, the light modulation device includes a first liquid crystal panel and a second liquid crystal panel that modulate an incident light beam by changing an arrangement state of liquid crystal molecules, and the first liquid crystal panel includes: The twist direction of the liquid crystal molecules is set to a different direction with respect to the second liquid crystal panel, and the adjusting member is arranged on a first imaginary line corresponding to the twist direction of the liquid crystal molecules in the first liquid crystal panel. A first adjusting member having the pair of arm portions projecting along the first imaginary line, the first adjusting member being rotatable about the first imaginary line, and the liquid crystal molecules of the second liquid crystal panel A second adjustment member having the pair of arm portions projecting along a second imaginary line corresponding to a twist direction and being rotatable with respect to the support member around the second imaginary line; Comprising the support part Preferably has four of the standing part which respectively face the tip of each of said pair of arms in the first adjusting member and the second adjusting member.

例えば、3つの液晶パネルを採用した三板式のプロジェクターでは、投影画像の色ムラ等を軽減させるために、液晶分子のねじれ方向が異なる第1液晶パネル及び第2液晶パネルの2種類の液晶パネル(所謂、L液晶パネル、R液晶パネル)が採用される。
このように2種類の液晶パネルを採用した場合には、光学補償素子の姿勢を調整する際の回転中心線も当該液晶パネルのねじれ方向に応じて設定する必要がある。
For example, in a three-plate projector employing three liquid crystal panels, two types of liquid crystal panels (first liquid crystal panel and second liquid crystal panel having different twist directions of liquid crystal molecules are used in order to reduce color unevenness in the projected image ( So-called L liquid crystal panels and R liquid crystal panels) are employed.
When two types of liquid crystal panels are employed in this way, it is necessary to set the rotation center line when adjusting the attitude of the optical compensation element in accordance with the twist direction of the liquid crystal panel.

本発明では、支持部材は、第1,第2の調整部材における各一対の腕部の先端にそれぞれ対向する4つの起立部を有する。
このことにより、支持部材として、第1の調整部材に対応した支持部材、及び第2の調整部材に対応した支持部材の2種類の支持部材を設ける必要がない。すなわち、支持部材が第1,第2の調整部材に共通に用いることができる部材となり、支持部材の製造コストを低減できる。
In the present invention, the support member has four upright portions respectively opposed to the tips of the pair of arm portions in the first and second adjustment members.
Accordingly, it is not necessary to provide two types of support members, that is, a support member corresponding to the first adjustment member and a support member corresponding to the second adjustment member as the support member. That is, the support member becomes a member that can be used in common for the first and second adjustment members, and the manufacturing cost of the support member can be reduced.

本発明のプロジェクターでは、前記調整部材は、調整部材本体と、前記調整部材本体から突出する前記一対の腕部と、前記調整部材本体から突出し、外部から操作される操作部とを備え、前記操作部は、前記光学補償素子の位置が調整された後、前記支持部材に固定されることが好ましい。
本発明では、光学補償素子の姿勢調整後、支持部材に対する調整部材の回転中心線から離間した位置にある上述した操作部が支持部材に固定される。
このことにより、例えば支持部材に対して調整部材が回転中心線に近接した位置で固定される構成と比較して、調整部材等に外力が加わった場合であっても、光学補償素子を姿勢調整後の所望の姿勢で良好に維持できる。
In the projector according to the aspect of the invention, the adjustment member includes an adjustment member main body, the pair of arm portions protruding from the adjustment member main body, and an operation unit protruding from the adjustment member main body and operated from the outside. The part is preferably fixed to the support member after the position of the optical compensation element is adjusted.
In the present invention, after adjusting the attitude of the optical compensation element, the above-described operation unit located at a position away from the rotation center line of the adjustment member with respect to the support member is fixed to the support member.
This makes it possible to adjust the attitude of the optical compensation element even when an external force is applied to the adjustment member, etc., compared to a configuration in which the adjustment member is fixed at a position close to the rotation center line with respect to the support member. It can be maintained well in a later desired posture.

本発明のプロジェクターでは、前記操作部は、前記調整部材本体から鉛直軸に沿って上方に突出する形状を有し、前記操作部には、鉛直軸に略直交して張り出す第1固定部が形成され、前記支持部材には、鉛直軸に略直交して張り出し、前記第1固定部に対向する第2固定部が形成され、前記第1固定部及び前記第2固定部は、互いに接着固定されることが好ましい。
本発明では、操作部及び支持部材には、上述した第1,第2固定部がそれぞれ形成されている。
このことにより、光学補償素子の姿勢調整後、支持部材に対して調整部材を固定するために第1固定部の上方側から接着剤を塗布した際に、第2固定部の上面にて接着剤を受けることができ、接着剤が垂れて、光学補償素子等の他の部位に付着することを防止できる。
In the projector according to the aspect of the invention, the operation unit may have a shape protruding upward along the vertical axis from the adjustment member main body, and the operation unit may include a first fixing unit that protrudes substantially perpendicular to the vertical axis. The support member is formed with a second fixing portion that extends substantially perpendicular to the vertical axis and faces the first fixing portion, and the first fixing portion and the second fixing portion are bonded and fixed to each other. It is preferred that
In the present invention, the first and second fixing portions described above are formed in the operation portion and the support member, respectively.
Thus, after adjusting the attitude of the optical compensation element, the adhesive is applied on the upper surface of the second fixing portion when the adhesive is applied from above the first fixing portion in order to fix the adjustment member to the support member. It is possible to prevent the adhesive from dripping and adhering to other parts such as an optical compensation element.

本実施形態におけるプロジェクターの概略構成を示す図。FIG. 2 is a diagram illustrating a schematic configuration of a projector according to the present embodiment. 本実施形態における光学補償ユニットの構成を示す図。The figure which shows the structure of the optical compensation unit in this embodiment. 本実施形態における光学補償ユニットの構成を示す図。The figure which shows the structure of the optical compensation unit in this embodiment. 本実施形態における第1の調整部材を光入射側から見た斜視図。The perspective view which looked at the 1st adjustment member in this embodiment from the light-incidence side. 本実施形態における第2の調整部材を光入射側から見た斜視図。The perspective view which looked at the 2nd adjustment member in this embodiment from the light-incidence side. 本実施形態における光学補償素子の姿勢調整方法を説明するための図。The figure for demonstrating the attitude | position adjustment method of the optical compensation element in this embodiment. 本実施形態における光学補償素子の姿勢調整方法を説明するための図。The figure for demonstrating the attitude | position adjustment method of the optical compensation element in this embodiment.

以下、本発明の実施の一形態を図面に基づいて説明する。
〔プロジェクターの構成〕
図1は、プロジェクター1の概略構成を示す図である。
プロジェクター1は、画像を投射してスクリーン(図示略)上に投影画像を表示する。
そして、このプロジェクター1は、図1に示すように、外装筐体2内部に収納される光学ユニット3を備える。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a diagram illustrating a schematic configuration of the projector 1.
The projector 1 projects an image and displays a projected image on a screen (not shown).
As shown in FIG. 1, the projector 1 includes an optical unit 3 that is housed in the exterior housing 2.

〔光学ユニットの構成〕
この光学ユニット3は、図1に示すように、光源ランプ311及びリフレクター312を有する光源装置31と、レンズアレイ321,322、偏光変換素子323、及び重畳レンズ324を有する照明光学装置32と、ダイクロイックミラー331,332、及び反射ミラー333を有する色分離光学装置33と、入射側レンズ341、リレーレンズ343、及び反射ミラー342,344を有するリレー光学装置34と、3つの入射側偏光板35と、光変調装置としての3つの液晶パネル4と、3つの光学補償ユニット5と、3つの出射側偏光板36と、色合成光学装置としてのクロスダイクロイックプリズム37と、投射光学装置としての投射レンズ38とを備える。
そして、光学ユニット3では、上述した構成により、光源装置31から出射され照明光学装置32を介した光束は、色分離光学装置33にて赤(R),緑(G),青(B)の3つの色光に分離される。また、分離された各色光は、各液晶パネル4にてそれぞれ変調される。変調された各色光は、プリズム37にて合成されて画像となり、投射レンズ38にてスクリーンに投射される。
[Configuration of optical unit]
As shown in FIG. 1, the optical unit 3 includes a light source device 31 having a light source lamp 311 and a reflector 312, an illumination optical device 32 having lens arrays 321, 322, a polarization conversion element 323, and a superimposing lens 324, and a dichroic. A color separation optical device 33 having mirrors 331 and 332 and a reflection mirror 333, an incident side lens 341, a relay lens 343, a relay optical device 34 having reflection mirrors 342 and 344, and three incident side polarizing plates 35; Three liquid crystal panels 4 as light modulation devices, three optical compensation units 5, three output side polarizing plates 36, a cross dichroic prism 37 as a color synthesis optical device, and a projection lens 38 as a projection optical device, Is provided.
In the optical unit 3, the light beam emitted from the light source device 31 and passing through the illumination optical device 32 is made red (R), green (G), and blue (B) by the color separation optical device 33 with the above-described configuration. Separated into three colored lights. Each separated color light is modulated by each liquid crystal panel 4. The modulated color lights are combined by a prism 37 to form an image and projected onto a screen by a projection lens 38.

ここで、上述した3つの液晶パネル4、3つの光学補償ユニット5、3つの出射側偏光板36は、具体的な図示は省略したが、プリズム37の各光入射面371(図1)に対して、3つの固定部材(図示略)を介してそれぞれ固定されるものである。
なお、上述した各部材31〜38は、一般的なプロジェクターで用いられる構成であるため、以下では、液晶パネル4と、光学補償ユニット5の構成のみを説明する。
Here, the three liquid crystal panels 4, the three optical compensation units 5, and the three output-side polarizing plates 36 are not specifically illustrated, but are arranged on the light incident surfaces 371 (FIG. 1) of the prism 37. And are fixed through three fixing members (not shown).
In addition, since each member 31-38 mentioned above is a structure used with a general projector, below, only the structure of the liquid crystal panel 4 and the optical compensation unit 5 is demonstrated.

〔液晶パネルの構成〕
3つの液晶パネル4は、図1に示すように、各入射側偏光板35の光路後段側にそれぞれ配設されている。
この液晶パネル4は、具体的な図示は省略するが、例えばツィストネマティック方式の透過型の液晶パネルであり、TFT基板と対向基板との間に液晶分子が密閉封入された構成を有する。そして、液晶パネル4は、制御装置(図示略)からの信号に基づいて電圧が印加されることで液晶分子の配列状態を変化させ、入射側偏光板35から出射された光束を変調する。
なお、以下では、説明の便宜上、R色光側の液晶パネル4を液晶パネル4Rとし、G色光側の液晶パネル4を液晶パネル4Gとし、B色光側の液晶パネル4を液晶パネル4Bとする(図1)。
[Configuration of LCD panel]
As shown in FIG. 1, the three liquid crystal panels 4 are respectively disposed on the rear side of the optical path of each incident side polarizing plate 35.
Although not specifically shown, the liquid crystal panel 4 is, for example, a twisted nematic transmissive liquid crystal panel, and has a configuration in which liquid crystal molecules are hermetically sealed between a TFT substrate and a counter substrate. The liquid crystal panel 4 changes the alignment state of the liquid crystal molecules by applying a voltage based on a signal from a control device (not shown), and modulates the light beam emitted from the incident side polarizing plate 35.
In the following, for convenience of explanation, the liquid crystal panel 4 on the R color light side is referred to as a liquid crystal panel 4R, the liquid crystal panel 4 on the G color light side is referred to as a liquid crystal panel 4G, and the liquid crystal panel 4 on the B color light side is referred to as a liquid crystal panel 4B. 1).

上述したように、光学ユニット3は、リレー光学装置34を採用している。
このため、各液晶パネル4R,4G,4Bを同一の製法で形成された液晶パネルで構成した場合には、R,G,Bの各色光のうち、リレー光学装置34を辿ることのない2つのG,Bの各色光側の各液晶パネル4G,4Bへの入射状態は略同一となるが、リレー光学装置34を辿るR色光側の液晶パネル4Rへの入射状態は、G,Bの各色光側の各液晶パネル4への入射状態に対して上下左右が逆転する。そして、このような状態では、画像に色ムラが生じやすい。
As described above, the optical unit 3 employs the relay optical device 34.
For this reason, when each of the liquid crystal panels 4R, 4G, and 4B is constituted by a liquid crystal panel formed by the same manufacturing method, two of the R, G, and B color lights that do not follow the relay optical device 34. Although the incident state to the liquid crystal panels 4G and 4B on the color light sides of G and B is substantially the same, the incident state to the liquid crystal panel 4R on the R color light side following the relay optical device 34 is the light of each color light of G and B. Upside down and left and right are reversed with respect to the incident state to each liquid crystal panel 4 on the side. In such a state, color unevenness tends to occur in the image.

そして、本実施形態では、上述した画像に生じる色ムラを軽減させるために、各液晶パネル4R,4Bを同一の製法で形成された液晶パネルで構成し、液晶パネル4Gを各液晶パネル4R,4Bとは異なる製法で形成された液晶パネルで構成している。
すなわち、3つの液晶パネル4を2種類の液晶パネルで構成している。
具体的に、液晶パネル4Gから出射された色光はプリズム37内の誘電体多層膜372(図1)を透過し、残りの各液晶パネル4R,4Bから出射された各色光はプリズム37内の誘電体多層膜372で反射されることによって、液晶パネル4R,4G,4Bからの各色光が合成される。
このため、それぞれ光の進行方向に向って、液晶パネル4Gの左側から出射された光は、液晶パネル4R,4Bの各右側の光と合成される。
以上のことから、各液晶パネル4R,4Bと、液晶パネル4Gとを異なる製法で形成された液晶パネルで構成している。
In this embodiment, in order to reduce the color unevenness that occurs in the image, the liquid crystal panels 4R and 4B are constituted by liquid crystal panels formed by the same manufacturing method, and the liquid crystal panel 4G is formed by the liquid crystal panels 4R and 4B. It is composed of a liquid crystal panel formed by a different manufacturing method.
That is, the three liquid crystal panels 4 are composed of two types of liquid crystal panels.
Specifically, the color light emitted from the liquid crystal panel 4G passes through the dielectric multilayer film 372 (FIG. 1) in the prism 37, and the respective color lights emitted from the remaining liquid crystal panels 4R and 4B are dielectric in the prism 37. Each color light from the liquid crystal panels 4R, 4G, and 4B is synthesized by being reflected by the body multilayer film 372.
Therefore, the light emitted from the left side of the liquid crystal panel 4G in the light traveling direction is combined with the light on the right side of the liquid crystal panels 4R and 4B.
From the above, each of the liquid crystal panels 4R and 4B and the liquid crystal panel 4G are constituted by liquid crystal panels formed by different manufacturing methods.

具体的に、2種類の液晶パネルは、以下の通りである。
すなわち、2種類の液晶パネルのうち、一方の液晶パネルは、対向基板側のラビング方向を基準として、TFT基板のラビング方向を90度左(反時計方向に)回転させ、液晶分子を左ねじれに設定した液晶パネル、所謂L液晶パネルである。
また、他方の液晶パネルは、対向基板側のラビング方向を基準として、TFT基板のラビング方向を90度右(時計方向に)回転させ、液晶分子を右ねじれに設定した液晶パネル、所謂R液晶パネルである。
そして、本実施形態では、各液晶パネル4R,4BをR液晶パネルで構成し、液晶パネル4GをL液晶パネルで構成している。
なお、以下では、説明の便宜上、各液晶パネル4R,4Bを第1の液晶パネル41(図1)とし、液晶パネル4Gを第2の液晶パネル42(図1)として説明する。
Specifically, the two types of liquid crystal panels are as follows.
That is, of the two types of liquid crystal panels, one liquid crystal panel rotates the rubbing direction of the TFT substrate 90 degrees to the left (counterclockwise) with respect to the rubbing direction on the opposite substrate side, and the liquid crystal molecules are twisted to the left. It is a set liquid crystal panel, a so-called L liquid crystal panel.
The other liquid crystal panel is a so-called R liquid crystal panel in which the rubbing direction of the TFT substrate is rotated 90 degrees to the right (clockwise) with the liquid crystal molecules set to the right twist with reference to the rubbing direction on the opposite substrate side. It is.
In this embodiment, each of the liquid crystal panels 4R and 4B is composed of an R liquid crystal panel, and the liquid crystal panel 4G is composed of an L liquid crystal panel.
In the following description, for convenience of description, the liquid crystal panels 4R and 4B are described as the first liquid crystal panel 41 (FIG. 1), and the liquid crystal panel 4G is described as the second liquid crystal panel 42 (FIG. 1).

〔光学補償ユニットの構成〕
図2及び図3は、光学補償ユニット5の構成を示す図である。具体的に、図2(A)は光学補償ユニット5を光入射側から見た図であり、図2(B)は光学補償ユニット5の側面図であり、図2(C)は光学補償ユニット5を光出射側から見た図である。図3は、光学補償ユニット5を光出射側から見た分解斜視図である。
3つの光学補償ユニット5は、図1に示すように、各液晶パネル4と各出射側偏光板36との間にそれぞれ配設される。
[Configuration of optical compensation unit]
2 and 3 are diagrams showing the configuration of the optical compensation unit 5. Specifically, FIG. 2A is a view of the optical compensation unit 5 viewed from the light incident side, FIG. 2B is a side view of the optical compensation unit 5, and FIG. 2C is an optical compensation unit. It is the figure which looked at 5 from the light-projection side. FIG. 3 is an exploded perspective view of the optical compensation unit 5 as viewed from the light emitting side.
As shown in FIG. 1, the three optical compensation units 5 are respectively disposed between the liquid crystal panels 4 and the output-side polarizing plates 36.

そして、3つの光学補償ユニット5は、第1の液晶パネル41(4R,4B)に対応した2つの第1の光学補償ユニット51(図1)と、第2の液晶パネル42(4G)に対応した1つの第2の光学補償ユニット52(図1)との2種類で構成されている。
なお、図2及び図3では、光学補償ユニット5の構成として、第1の光学補償ユニット51の構成を図示している。
第1,第2の光学補償ユニット51,52は、略同様の構成を有し、後述するように調整部材7の構造が異なるのみである。このため、以下では、第1の光学補償ユニット51を主に説明し、第2の光学補償ユニット52については、第1の光学補償ユニット51と同様の構造に同一符号を付して、構造が異なる調整部材7のみを主に説明する。
The three optical compensation units 5 correspond to the two first optical compensation units 51 (FIG. 1) corresponding to the first liquid crystal panel 41 (4R, 4B) and the second liquid crystal panel 42 (4G). The second optical compensation unit 52 (FIG. 1) is composed of two types.
2 and 3, the configuration of the first optical compensation unit 51 is illustrated as the configuration of the optical compensation unit 5.
The first and second optical compensation units 51 and 52 have substantially the same configuration, and only the structure of the adjustment member 7 is different as will be described later. Therefore, in the following, the first optical compensation unit 51 will be mainly described, and for the second optical compensation unit 52, the same structure as the first optical compensation unit 51 is denoted by the same reference numeral, and the structure is Only the different adjustment members 7 will be mainly described.

〔第1の光学補償ユニットの構成〕
第1の光学補償ユニット51は、図2または図3に示すように、光学補償素子6と、調整部材7と、支持部材8とを備える。
なお、調整部材7については、説明の便宜上、第1の光学補償ユニット51を構成する調整部材7を第1の調整部材7Aとし、第2の光学補償ユニット52を構成する調整部材7を第2の調整部材7B(図5参照)とする。
[Configuration of First Optical Compensation Unit]
As shown in FIG. 2 or FIG. 3, the first optical compensation unit 51 includes an optical compensation element 6, an adjustment member 7, and a support member 8.
For the convenience of explanation, the adjustment member 7 constituting the first optical compensation unit 51 is referred to as the first adjustment member 7A, and the adjustment member 7 constituting the second optical compensation unit 52 is the second. The adjustment member 7B (see FIG. 5).

〔光学補償素子の構成〕
光学補償素子6は、ガラスまたはプラスチック等のポリマー製の透明板状に、複屈折性を有する無機若しくは有機材料からなる板状部材、または、これらを複合した板状部材、WV(Wide View)フィルム等を取り付けたものである。
この光学補償素子6は、液晶パネル4(第1の光学補償ユニット51では第1の液晶パネル41、第2の光学補償ユニット52では第2の液晶パネル42)にて正確に変調できなかった位相変調量を微調整し(液晶パネル4を介した光束の位相差を補償し)、投影画像のコントラストを向上させる。
[Configuration of optical compensation element]
The optical compensation element 6 is a transparent plate made of a polymer such as glass or plastic, a plate-like member made of an inorganic or organic material having birefringence, or a plate-like member obtained by combining these, or a WV (Wide View) film. Etc. are attached.
This optical compensation element 6 has a phase that could not be accurately modulated by the liquid crystal panel 4 (the first liquid crystal panel 41 in the first optical compensation unit 51 and the second liquid crystal panel 42 in the second optical compensation unit 52). The modulation amount is finely adjusted (the phase difference of the light beam through the liquid crystal panel 4 is compensated) to improve the contrast of the projected image.

〔第1の調整部材の構成〕
図4は、第1の調整部材7Aを光入射側から見た斜視図である。
第1の調整部材7Aは、光学補償素子6が取り付けられ、第1の仮想線Ax1(図2〜図4)を中心として回転することで、光学補償素子6の位置を調整する。
この第1の調整部材7Aは、金属板が板金加工されることにより形成され、図3または図4に示すように、調整部材本体71と、一対の腕部72と、操作部73とを備える。
調整部材本体71は、図3に示すように、光学補償素子6と略同様の大きさを有する矩形状の板体で構成されている。
この調整部材本体71において、中央部分には、図3または図4に示すように、光束を通過させるための矩形状の開口部711が形成されている。
そして、光学補償素子6は、図2(C)または図3に示すように、調整部材本体71における光出射側の端面において、開口部711を閉塞するように取り付けられる。
[Configuration of First Adjustment Member]
FIG. 4 is a perspective view of the first adjustment member 7A viewed from the light incident side.
The first adjustment member 7A is attached with the optical compensation element 6, and adjusts the position of the optical compensation element 6 by rotating around the first virtual line Ax1 (FIGS. 2 to 4).
The first adjustment member 7A is formed by processing a metal plate into a sheet metal, and includes an adjustment member main body 71, a pair of arm portions 72, and an operation portion 73, as shown in FIG. 3 or FIG. .
As shown in FIG. 3, the adjustment member main body 71 is composed of a rectangular plate having substantially the same size as the optical compensation element 6.
As shown in FIG. 3 or FIG. 4, the adjustment member main body 71 has a rectangular opening 711 for allowing a light beam to pass therethrough.
Then, as shown in FIG. 2C or 3, the optical compensation element 6 is attached so as to close the opening 711 on the light emitting side end face of the adjustment member main body 71.

一対の腕部72は、図3または図4に示すように、光入射側から見て調整部材本体71における右上角部C1及び左下角部C3から第1の仮想線Ax1に沿って互いに離間する方向に突出する。そして、一対の腕部72は、先端部分721が光出射側に向けて略90°折り曲げられた略L字形状をそれぞれ有する。
なお、第1の仮想線Ax1は、第1の調整部材7Aに光学補償素子6が取り付けられた状態で、光入射側から見て、矩形形状を有する光学補償素子6の右上角部及び左下角部を結ぶ直線に略平行した仮想線である。
また、一対の腕部72において、先端部分721におけるL字外側部分には、図3または図4に示すように、第1の仮想線Ax1に沿って互いに離間する方向に突出する円柱状の突起部722がそれぞれ形成されている。
As shown in FIG. 3 or FIG. 4, the pair of arm portions 72 are separated from each other along the first virtual line Ax1 from the upper right corner portion C1 and the lower left corner portion C3 of the adjustment member main body 71 when viewed from the light incident side. Protrude in the direction. And a pair of arm part 72 has the substantially L shape by which the front-end | tip part 721 bent about 90 degrees toward the light-projection side, respectively.
The first imaginary line Ax1 is an upper right corner and a lower left corner of the optical compensation element 6 having a rectangular shape when viewed from the light incident side in a state where the optical compensation element 6 is attached to the first adjustment member 7A. It is a virtual line substantially parallel to a straight line connecting the parts.
In addition, in the pair of arms 72, the L-shaped outer portion of the distal end portion 721 has a cylindrical protrusion protruding in a direction away from each other along the first imaginary line Ax 1, as shown in FIG. 3 or FIG. Each part 722 is formed.

操作部73は、外部から操作される部分である。
この操作部73は、図3または図4に示すように、調整部材本体71の上縁部71Uにおける左右方向の略中央部分から鉛直軸に沿って上方側に突出する。
具体的に、操作部73の先端部分731は、支持部材8に対して調整部材7が組み込まれた状態で、図2に示すように、光入射側または光出射側から見て、支持部材8よりも上方側に突出している。
ここで、先端部分731の左右両端部分731Aは、図3または図4に示すように、光出射側に向けて略90°折り曲げられている。また、当該折り曲げられた左右両端部分731Aの各下端部分731Bは、互いに離間する方向に略90°折り曲げられ、鉛直軸に直交する水平面に沿って張り出すように形成される。そして、当該折り曲げられた各下端部分731Bは、下方側の端面731Cが水平面に略平行となり、支持部材8に対して第1の調整部材7Aを固定する際に利用される。
すなわち、折り曲げられた各下端部分731Bが本発明に係る第1固定部に相当する(以下、第1固定部731Bと記載)。
The operation unit 73 is a part operated from the outside.
As shown in FIG. 3 or FIG. 4, the operation portion 73 protrudes upward along the vertical axis from a substantially central portion in the left-right direction of the upper edge portion 71 </ b> U of the adjustment member main body 71.
Specifically, the distal end portion 731 of the operation portion 73 is in a state in which the adjustment member 7 is incorporated with respect to the support member 8, as shown in FIG. It protrudes to the upper side.
Here, the left and right end portions 731A of the tip portion 731 are bent by approximately 90 ° toward the light emitting side, as shown in FIG. 3 or FIG. Further, the bent lower end portions 731B of the left and right end portions 731A are bent by approximately 90 ° in directions away from each other, and are formed so as to protrude along a horizontal plane perpendicular to the vertical axis. Each bent lower end portion 731 </ b> B is used when the lower end surface 731 </ b> C is substantially parallel to the horizontal plane and the first adjustment member 7 </ b> A is fixed to the support member 8.
That is, each bent lower end portion 731B corresponds to a first fixing portion according to the present invention (hereinafter referred to as a first fixing portion 731B).

なお、本実施形態では、操作部73は、光学補償素子6の姿勢調整時の操作性を向上させるために、以下に示すように、設定されている。
すなわち、操作部73は、図2(B)に示すように、調整部材本体71の板面に対して先端部分731が光出射側に位置するように、調整部材本体71に対して基端(調整部材本体71との接続部分)が若干、折り曲げられている。
また、操作部73は、具体的な図示は省略したが、光入射側から見て左側の第1固定部731Bが右側の第1固定部731Bに対して光出射側に位置するように、調整部材本体71に対して若干、捩れた状態となっている。
In the present embodiment, the operation unit 73 is set as follows in order to improve the operability when adjusting the posture of the optical compensation element 6.
That is, the operation unit 73 has a base end (with respect to the adjustment member main body 71 such that the distal end portion 731 is positioned on the light emission side with respect to the plate surface of the adjustment member main body 71 as shown in FIG. The connection portion with the adjustment member main body 71 is slightly bent.
The operation unit 73 is not specifically illustrated, but is adjusted so that the first fixing unit 731B on the left side as viewed from the light incident side is positioned on the light emitting side with respect to the first fixing unit 731B on the right side. The member main body 71 is slightly twisted.

〔支持部材の構成〕
支持部材8は、光学補償素子6の姿勢調整時に調整部材7を回転可能に軸支するとともに、姿勢調整後に調整部材7が固定される部分である。
この支持部材8は、金属板が板金加工されることにより形成され、図2または図3に示すように、支持部材本体81と、一対の保持部82と、一対の第2固定部83とを備える。
(Configuration of support member)
The support member 8 is a part that rotatably supports the adjustment member 7 when the posture of the optical compensation element 6 is adjusted and to which the adjustment member 7 is fixed after the posture adjustment.
The support member 8 is formed by processing a metal plate into a sheet metal. As shown in FIG. 2 or FIG. 3, the support member main body 81, a pair of holding portions 82, and a pair of second fixing portions 83 are provided. Prepare.

支持部材本体81は、図2または図3に示すように、調整部材本体71よりも大きい略矩形状の板体で構成されている。
そして、この支持部材本体81において、中央部分には、光束を通過させるための矩形状の開口部811が形成されている。
また、支持部材本体81において、四隅部分には、固定用孔812がそれぞれ形成されている。
なお、4つの固定用孔812は、具体的な図示を省略したが、プリズム37の光入射面371に固定される前記固定部材(図示略)に形成された4つのピン(図示略)が挿通される部分であり、すなわち、光学補償ユニット5をプリズム37の光入射面371に固定するために利用される。
As shown in FIG. 2 or 3, the support member main body 81 is configured by a substantially rectangular plate larger than the adjustment member main body 71.
And in this support member main body 81, the rectangular-shaped opening part 811 for allowing a light beam to pass through is formed in the center part.
In the support member main body 81, fixing holes 812 are formed at the four corners, respectively.
Although the four fixing holes 812 are not specifically shown, four pins (not shown) formed in the fixing member (not shown) fixed to the light incident surface 371 of the prism 37 are inserted. That is, it is used for fixing the optical compensation unit 5 to the light incident surface 371 of the prism 37.

一対の保持部82は、光学補償素子6の姿勢調整時に、調整部材7を回転可能に軸支する部分である。
具体的に、一対の保持部82は、図2または図3に示すように、支持部材本体81における左右両端部分の一部が光出射側に向けて略90°折り曲げられた部分である。
一対の保持部82において、基端側(折り曲げられた箇所に近接する側)には、図2(B)または図3に示すように、上下縁部分から上下方向の略中央位置に向けて切り欠かれた切り欠き部82A〜82Dが形成されている。
The pair of holding portions 82 are portions that rotatably support the adjustment member 7 when adjusting the posture of the optical compensation element 6.
Specifically, as shown in FIG. 2 or FIG. 3, the pair of holding portions 82 are portions where both left and right end portions of the support member main body 81 are bent by approximately 90 ° toward the light emitting side.
In the pair of holding portions 82, the base end side (side close to the bent portion) is cut from the upper and lower edge portions toward the substantially central position in the vertical direction as shown in FIG. 2B or FIG. 3. Cutout portions 82A to 82D are formed.

また、一対の保持部82において、先端側(折り曲げられた箇所から離間する側)の上下端部821〜824は、図2(C)または図3に示すように、光出射側から見て、開口部811に向けて略45°折り曲げられている。
これら各端部821〜824は、支持部材8に対して調整部材7が組み込まれた状態で、調整部材7における腕部72の先端部分721に対向する。
例えば、支持部材8に対して第1の調整部材7Aが組み込まれた場合には、図2(C)に示すように、光入射側から見て右上及び左下の各端部821,823が第1の調整部材7Aにおける一対の腕部72の先端部分721に対向する。
In addition, in the pair of holding portions 82, the upper and lower end portions 821 to 824 on the distal end side (side away from the bent portion) are viewed from the light emitting side as shown in FIG. It is bent approximately 45 ° toward the opening 811.
Each of these end portions 821 to 824 faces the distal end portion 721 of the arm portion 72 of the adjustment member 7 in a state where the adjustment member 7 is incorporated into the support member 8.
For example, when the first adjustment member 7A is incorporated into the support member 8, as shown in FIG. 2C, the upper and lower left ends 821 and 823 are viewed from the light incident side. It opposes the front-end | tip part 721 of a pair of arm part 72 in 7 A of adjustment members.

また、各端部821〜824には、図3に示すように、調整部材7の突起部722が挿通される挿通孔821A〜824Aがそれぞれ形成されている。
そして、調整部材7は、突起部722が挿通孔821A〜824Aにそれぞれ挿通される(例えば、第1の調整部材7Aでは、各突起部722が挿通孔821A,823Aにそれぞれ挿通される)ことで、支持部材8に対して回転可能に軸支される。
すなわち、各端部821〜824は、本発明に係る起立部に相当する(以下、起立部821〜824と記載)。
また、突起部722及び挿通孔821A〜824Aが本発明に係る係合構造に相当する。
Further, as shown in FIG. 3, insertion holes 821 </ b> A to 824 </ b> A through which the protrusions 722 of the adjustment member 7 are inserted are formed in the end portions 821 to 824, respectively.
And as for the adjustment member 7, the projection part 722 is each penetrated by insertion hole 821A-824A (For example, in 1st adjustment member 7A, each projection part 722 is each penetrated by penetration hole 821A, 823A). The support member 8 is rotatably supported.
That is, each of the end portions 821 to 824 corresponds to an upright portion according to the present invention (hereinafter referred to as the upright portions 821 to 824).
Further, the protrusion 722 and the insertion holes 821A to 824A correspond to the engagement structure according to the present invention.

一対の第2固定部83は、光学補償素子6の姿勢調整後、調整部材7が固定される部分である。
具体的に、一対の第2固定部83は、図2または図3に示すように、支持部材本体81の上端部分の一部が光出射側に向けて略90°折り曲げられた部分である。
これら一対の第2固定部83は、図2に示すように、支持部材8に対して調整部材7が組み込まれた際に、光出射側から見て、調整部材7の操作部73を挟む左右両側にそれぞれ位置する。
The pair of second fixing portions 83 are portions to which the adjustment member 7 is fixed after the attitude of the optical compensation element 6 is adjusted.
Specifically, as shown in FIG. 2 or FIG. 3, the pair of second fixing portions 83 are portions where a part of the upper end portion of the support member main body 81 is bent by approximately 90 ° toward the light emitting side.
As shown in FIG. 2, the pair of second fixing portions 83 includes left and right sandwiching the operation portion 73 of the adjustment member 7 when the adjustment member 7 is incorporated into the support member 8 when viewed from the light emitting side. Located on each side.

そして、一対の第2固定部83における各上方側の端面831は、図2(B)に示すように、側方から見て、上方側に凸となるように緩やかに湾曲した曲面状に形成され、支持部材8に対して調整部材7が組み込まれた際に、調整部材7の第1固定部731Bの各端面731Cに対して所定の隙間を空けた状態で対向する。
なお、各上方側の端面831は、光学補償素子6の姿勢調整を考慮して、各端面731Cよりも大きい面積を有するように形成されている。
Then, as shown in FIG. 2B, each upper end surface 831 of the pair of second fixing portions 83 is formed in a curved surface that is gently curved so as to protrude upward. When the adjustment member 7 is incorporated into the support member 8, the adjustment member 7 is opposed to each end surface 731 </ b> C of the first fixing portion 731 </ b> B of the adjustment member 7 with a predetermined gap.
Each upper end face 831 is formed to have a larger area than each end face 731C in consideration of the posture adjustment of the optical compensation element 6.

〔第2の光学補償ユニットの構成〕
第2の光学補償ユニット52は、上述したように、第1の光学補償ユニット51と同様の構成6〜8を有し、第2の調整部材7Bの構造が第1の調整部材7Aの構造と異なるのみである。
[Configuration of Second Optical Compensation Unit]
As described above, the second optical compensation unit 52 has the same configurations 6 to 8 as the first optical compensation unit 51, and the structure of the second adjustment member 7B is the same as the structure of the first adjustment member 7A. Only different.

〔第2の調整部材の構成〕
図5は、第2の調整部材7Bを光入射側から見た斜視図である。
第2の調整部材7Bは、図7に示すように、第1の調整部材7Aに対して、一対の腕部72の形成位置が異なるのみである。
具体的に、第2の調整部材7Bにおける一対の腕部72は、図5に示すように、光入射側から見て調整部材本体71における左上角部C2及び右下角部C4から第2の仮想線Ax2に沿って互いに離間する方向に突出する。
なお、第2の仮想線Ax2は、第2の調整部材7Bに光学補償素子6が取り付けられた状態で、光入射側から見て、光学補償素子6の左上角部及び右下角部を結ぶ直線(第1の仮想線Ax1に交差する直線)に略平行した仮想線である。
[Configuration of Second Adjustment Member]
FIG. 5 is a perspective view of the second adjustment member 7B as viewed from the light incident side.
As shown in FIG. 7, the second adjustment member 7B is different from the first adjustment member 7A only in the formation position of the pair of arm portions 72.
Specifically, as shown in FIG. 5, the pair of arm portions 72 in the second adjustment member 7 </ b> B is formed from the upper left corner C <b> 2 and the lower right corner C <b> 4 in the adjustment member main body 71 as viewed from the light incident side. Projecting in a direction away from each other along the line Ax2.
The second virtual line Ax2 is a straight line connecting the upper left corner and the lower right corner of the optical compensation element 6 when viewed from the light incident side in a state where the optical compensation element 6 is attached to the second adjustment member 7B. This is a virtual line substantially parallel to (a straight line intersecting the first virtual line Ax1).

そして、第2の調整部材7Bは、支持部材8に組み込まれた状態で、一対の腕部72の各先端部分721が支持部材8における光入射側から見て左上及び右下の各起立部822,824にそれぞれ対向する。また、各突起部722は、各起立部822,824の各挿通孔822A,824Aに挿通される。そして、第2の調整部材7Bは、支持部材8に対して回転可能に軸支される。
なお、具体的な図示は省略したが、第2の調整部材7Bにおける操作部73は、光学補償素子6の姿勢調整時の操作性を向上させるために、第1の調整部材7Aとは異なり、光入射側から見て左側の第1固定部731Bが右側の第1固定部731Bに対して光入射側に位置するように、調整部材本体71に対して若干、捩れた状態となっている。
The second adjustment member 7 </ b> B is incorporated in the support member 8, and the tip portions 721 of the pair of arm portions 72 are standing portions 822 on the upper left and lower right as viewed from the light incident side of the support member 8. , 824, respectively. Further, each protrusion 722 is inserted into each insertion hole 822A, 824A of each upright portion 822, 824. The second adjustment member 7 </ b> B is pivotally supported with respect to the support member 8.
Although not specifically shown, the operation unit 73 in the second adjustment member 7B is different from the first adjustment member 7A in order to improve the operability at the time of adjusting the attitude of the optical compensation element 6, When viewed from the light incident side, the first fixing portion 731B on the left side is slightly twisted with respect to the adjustment member main body 71 so that the first fixing portion 731B on the left side is located on the light incident side with respect to the first fixing portion 731B on the right side.

〔光学補償素子の姿勢調整方法〕
次に、光学補償素子6の姿勢調整方法について説明する。
図6及び図7は、光学補償素子6の姿勢調整方法を説明するための図である。具体的に、図6は第1の光学補償ユニット51を構成する光学補償素子6の姿勢調整方法を説明するための図であり、図7は第2の光学補償ユニット52を構成する光学補償素子6の姿勢調整方法を説明するための図である。
先ず、作業者は、3つの光学補償ユニット5(2つの第1の光学補償ユニット51、及び1つの第2の光学補償ユニット52)を組み立てる。
[Attitude adjustment method of optical compensation element]
Next, a method for adjusting the attitude of the optical compensation element 6 will be described.
6 and 7 are diagrams for explaining a method of adjusting the posture of the optical compensation element 6. Specifically, FIG. 6 is a diagram for explaining a method of adjusting the attitude of the optical compensation element 6 constituting the first optical compensation unit 51, and FIG. 7 is an optical compensation element constituting the second optical compensation unit 52. FIG. 6 is a diagram for explaining a posture adjustment method 6;
First, the operator assembles three optical compensation units 5 (two first optical compensation units 51 and one second optical compensation unit 52).

具体的に、作業者は、第1の光学補償ユニット51を以下に示すように組み立てる。
すなわち、作業者は、光学補償素子6を第1の調整部材7Aに対して、接着剤等により取り付ける。
また、作業者は、光出射側から第1の調整部材7Aの一対の腕部72の各先端部分721を支持部材8の一対の起立部821,823間にあてがう。そして、作業者は、各突起部722が各挿通孔821A,823Aに挿通されるまで、第1の調整部材7Aを支持部材8に向けて押し込む。
この状態では、一対の起立部821,823は、互いに離間する方向に弾性変形し、一対の腕部72の各先端部分721にそれぞれ当接する。
すなわち、一対の起立部821,823間の離間寸法は、一対の腕部72の各先端部分721間の離間寸法に対して、略同一あるいは若干小さく設定されている。
また、作業者は、光学補償素子6を第2の調整部材7Bに固定する。そして、作業者は、上記同様に第2の調整部材7Bを支持部材8に取り付けることで、第2の光学補償ユニット52を組み立てる。
この状態では、上記同様に、一対の起立部822,824は、互いに離間する方向に弾性変形し、一対の腕部72の各先端部分721にそれぞれ当接する。
Specifically, the operator assembles the first optical compensation unit 51 as shown below.
That is, the operator attaches the optical compensation element 6 to the first adjustment member 7A with an adhesive or the like.
Further, the operator places the tip portions 721 of the pair of arms 72 of the first adjustment member 7 </ b> A between the pair of upright portions 821 and 823 of the support member 8 from the light emitting side. Then, the operator pushes the first adjustment member 7A toward the support member 8 until each projection 722 is inserted into each insertion hole 821A, 823A.
In this state, the pair of upright portions 821 and 823 are elastically deformed in a direction away from each other, and abut against the respective tip portions 721 of the pair of arm portions 72.
That is, the separation dimension between the pair of upright portions 821 and 823 is set to be substantially the same or slightly smaller than the separation dimension between the tip portions 721 of the pair of arm portions 72.
The operator also fixes the optical compensation element 6 to the second adjustment member 7B. And an operator assembles the 2nd optical compensation unit 52 by attaching the 2nd adjustment member 7B to the support member 8 similarly to the above.
In this state, as described above, the pair of upright portions 822 and 824 are elastically deformed in a direction away from each other, and abut against the respective tip portions 721 of the pair of arm portions 72.

次に、作業者は、前記固定部材を利用して、3つの液晶パネル4、上記のように組み立てられた3つの光学補償ユニット5、及び3つの出射側偏光板36をプリズム37の各光入射面371に固定する。
次に、作業者は、3つの光学補償ユニット5を構成する各光学補償素子6の姿勢調整を実施する。
例えば、第1の光学補償ユニット51を構成する光学補償素子6の姿勢調整については、以下に示すように実施する。
すなわち、作業者は、光学補償素子6の姿勢調整を行う調整装置(図示略)を利用して、第1の液晶パネル41に向けて姿勢調整用の光束を出射させる。
そして、作業者は、第1の液晶パネル41にて変調され、光学補償素子6、出射側偏光板36、プリズム37、及び投射レンズ(図示略)を介してスクリーンに投射された投影画像を確認しながら、当該投影画像のコントラストが最大となるように、光学補償素子6の姿勢調整を実施する。
Next, the operator uses the fixing member to connect the three liquid crystal panels 4, the three optical compensation units 5 assembled as described above, and the three output-side polarizing plates 36 to each light incident on the prism 37. Fix to the surface 371.
Next, the operator performs posture adjustment of each optical compensation element 6 constituting the three optical compensation units 5.
For example, the posture adjustment of the optical compensation element 6 constituting the first optical compensation unit 51 is performed as follows.
In other words, the worker uses an adjustment device (not shown) that adjusts the posture of the optical compensation element 6 to emit a light beam for posture adjustment toward the first liquid crystal panel 41.
Then, the operator confirms the projected image that is modulated by the first liquid crystal panel 41 and projected onto the screen via the optical compensation element 6, the exit-side polarizing plate 36, the prism 37, and a projection lens (not shown). However, the attitude adjustment of the optical compensation element 6 is performed so that the contrast of the projected image is maximized.

すなわち、作業者は、図6に示すように、上方側に突出した操作部73の先端部分731を、入射した光束の光軸に沿って前後に移動させることで、第1の仮想線Ax1を中心として第1の調整部材7A(光学補償素子6)を回転させる。
そして、作業者は、上述したように光学補償素子6を回転させ、投影画像のコントラストが最大となる位置(液晶パネル4の液晶材料や配向状態に応じて光学補償素子6の光学軸の方位が適正となる位置)に位置付けた後、以下に示すように、支持部材8に対して第1の調整部材7Aを固定する。
すなわち、作業者は、各第1固定部731Bの上方側から接着剤(例えば、光硬化型接着剤)を塗布し、各第1固定部731Bを各第2固定部83に固定する。
That is, as shown in FIG. 6, the operator moves the first virtual line Ax1 by moving the tip portion 731 of the operation portion 73 protruding upward along the optical axis of the incident light beam. The first adjustment member 7A (optical compensation element 6) is rotated as the center.
Then, the operator rotates the optical compensation element 6 as described above, and the position where the contrast of the projected image is maximized (the orientation of the optical axis of the optical compensation element 6 depends on the liquid crystal material and the orientation state of the liquid crystal panel 4). After being positioned at an appropriate position), the first adjustment member 7A is fixed to the support member 8 as shown below.
That is, the worker applies an adhesive (for example, a photocurable adhesive) from the upper side of each first fixing portion 731 </ b> B, and fixes each first fixing portion 731 </ b> B to each second fixing portion 83.

なお、第2の光学補償ユニット52を構成する光学補償素子6の姿勢調整、及び支持部材8に対する第2の調整部材7Bの固定については、図7に示すように第2の仮想線Ax2を中心として第2の調整部材7B(光学補償素子6)を回転させる以外は、上記同様であるため、説明を省略する。   Note that the attitude adjustment of the optical compensation element 6 constituting the second optical compensation unit 52 and the fixing of the second adjustment member 7B to the support member 8 are centered on the second imaginary line Ax2, as shown in FIG. As described above, except that the second adjustment member 7B (optical compensation element 6) is rotated, the description thereof is omitted.

上述した本実施形態によれば、以下の効果がある。
本実施形態では、調整部材7は、突起部722及び挿通孔821A,823A(822A,824A)を有する係合構造により、支持部材8に対して回転可能に構成されている。すなわち、調整部材7(光学補償素子6)は、挿通孔821A,823A(822A,824A)に突起部722が挿通された状態で、支持部材8に対して回転(姿勢調整)することとなる。
このため、光学補償素子6の姿勢調整時に、回転中心線(第1,第2の仮想線Ax1,Ax2)がずれることがなく、光学補償素子6の姿勢を良好に調整できる。
According to this embodiment described above, the following effects are obtained.
In the present embodiment, the adjustment member 7 is configured to be rotatable with respect to the support member 8 by an engagement structure having a protrusion 722 and insertion holes 821A and 823A (822A and 824A). In other words, the adjustment member 7 (optical compensation element 6) rotates (posture adjustment) with respect to the support member 8 in a state where the protrusion 722 is inserted through the insertion holes 821A and 823A (822A and 824A).
For this reason, when the attitude of the optical compensation element 6 is adjusted, the rotation center lines (first and second virtual lines Ax1, Ax2) are not shifted, and the attitude of the optical compensation element 6 can be adjusted favorably.

また、一対の起立部821,823(822,824)は、弾性変形しながら一対の腕部72にそれぞれ当接する。このため、調整部材7の回転時には、起立部821,823(822,824)及び腕部72間に起立部821,823(822,824)の弾性変形等に応じた摩擦力が生じることとなる。
すなわち、調整部材7は、当該摩擦力により、調整部材7や光学補償素子6の自重等によって不要に回転することが抑制される。このため、光学補償素子6の姿勢を精度良く調整(微調整)できる。
Further, the pair of upright portions 821, 823 (822, 824) abut against the pair of arm portions 72 while being elastically deformed. For this reason, during the rotation of the adjustment member 7, a frictional force corresponding to the elastic deformation of the standing parts 821, 823 (822, 824) is generated between the standing parts 821, 823 (822, 824) and the arm part 72. .
That is, the adjustment member 7 is prevented from rotating unnecessarily due to the weight of the adjustment member 7 or the optical compensation element 6 due to the frictional force. For this reason, the attitude of the optical compensation element 6 can be adjusted (finely adjusted) with high accuracy.

さらに、支持部材8は、第1,第2の調整部材7A,7Bにおける各一対の腕部72の先端部分721にそれぞれ対向する4つの起立部821〜824を有する。
このことにより、支持部材8として、第1の調整部材7Aに対応した支持部材、及び第2の調整部材7Bに対応した支持部材の2種類の支持部材を設ける必要がない。すなわち、支持部材8が第1,第2の調整部材7A,7Bに共通に用いることができる部材となり、支持部材8の製造コストを低減できる。
Furthermore, the support member 8 has four upright portions 821 to 824 that respectively face the tip portions 721 of the pair of arm portions 72 in the first and second adjustment members 7A and 7B.
Accordingly, it is not necessary to provide two types of support members, that is, a support member corresponding to the first adjustment member 7A and a support member corresponding to the second adjustment member 7B as the support member 8. That is, the support member 8 becomes a member that can be used in common for the first and second adjustment members 7A and 7B, and the manufacturing cost of the support member 8 can be reduced.

また、光学補償素子6の姿勢調整後、支持部材8に対する調整部材7の回転中心線(第1,第2の仮想線Ax1,Ax2)から離間した位置にある操作部73が支持部材8に固定される。
このことにより、例えば支持部材8に対して調整部材7が回転中心線(第1,第2の仮想線Ax1,Ax2)に近接する位置で固定される構成と比較して、調整部材7等に外力が加わった場合であっても、光学補償素子6を姿勢調整後の所望の姿勢で良好に維持できる。
Further, after adjusting the attitude of the optical compensation element 6, the operation unit 73 located at a position separated from the rotation center line (first and second virtual lines Ax 1, Ax 2) of the adjustment member 7 with respect to the support member 8 is fixed to the support member 8. Is done.
Thereby, for example, the adjustment member 7 is adjusted with respect to the support member 8 as compared with the configuration in which the adjustment member 7 is fixed at a position close to the rotation center line (first and second virtual lines Ax1, Ax2). Even when an external force is applied, the optical compensation element 6 can be favorably maintained in a desired posture after the posture adjustment.

さらに、操作部73及び支持部材8には、第1,第2固定部731B,83がそれぞれ形成されている。
このことにより、光学補償素子6の姿勢調整後、支持部材8に対して調整部材7を固定するために第1固定部731Bの上方側から接着剤を塗布した際に、第2固定部83の上方側の端面831にて接着剤を受けることができ、接着剤が垂れて、光学補償素子6等の他の部位に付着することを防止できる。
Further, the operation portion 73 and the support member 8 are formed with first and second fixing portions 731B and 83, respectively.
Thus, after adjusting the attitude of the optical compensation element 6, when the adhesive is applied from the upper side of the first fixing portion 731 </ b> B in order to fix the adjustment member 7 to the support member 8, An adhesive can be received at the upper end surface 831, and the adhesive can be prevented from dripping and adhering to other parts such as the optical compensation element 6.

なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
前記実施形態では、腕部72に突起部722を設け、起立部821〜824に挿通孔821A〜824Aを設けていたが、これに限らず、腕部に挿通孔を設け、起立部に突起部を設けた構成を採用しても構わない。
前記実施形態では、一対の腕部72の各先端部分721は、起立部821,823(822,824)に対して内側に位置するように構成されていたが、これに限らず、起立部821,823(822,824)に対して外側に位置するように構成しても構わない。
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the protruding portion 722 is provided on the arm portion 72, and the insertion holes 821A to 824A are provided on the standing portions 821 to 824. However, the invention is not limited thereto, and the insertion portion is provided on the arm portion. You may employ | adopt the structure which provided.
In the above-described embodiment, the tip portions 721 of the pair of arm portions 72 are configured to be positioned on the inner side with respect to the standing portions 821, 823 (822, 824). , 823 (822, 824).

前記実施形態では、液晶パネル4R,4Bを第1の液晶パネル41(R液晶パネル)とし、液晶パネル4Gを第2の液晶パネル42(L液晶パネル)としていたが、これに限らない。逆に、液晶パネル4R,4Bを第2の液晶パネル42(L液晶パネル)とし、液晶パネル4Gを第1の液晶パネル41(R液晶パネル)としても構わない。   In the above embodiment, the liquid crystal panels 4R and 4B are the first liquid crystal panel 41 (R liquid crystal panel) and the liquid crystal panel 4G is the second liquid crystal panel 42 (L liquid crystal panel). Conversely, the liquid crystal panels 4R and 4B may be the second liquid crystal panel 42 (L liquid crystal panel), and the liquid crystal panel 4G may be the first liquid crystal panel 41 (R liquid crystal panel).

前記実施形態では、光変調装置として、透過型の液晶パネル4を採用したが、これに限らず、反射型の液晶パネルを採用しても構わない。
前記実施形態において、光学補償素子6の姿勢調整方法は、前記実施形態で説明した姿勢調整方法に限らない。
例えば、前記実施形態では、スクリーン上の投影画像を確認しながら光学補償素子6の姿勢調整を実施していたが、これに限らず、プリズム37から出射される姿勢調整用の光束をCCDカメラ等で直接、検出しながら姿勢調整を実施する方法を採用しても構わない。
In the embodiment, the transmissive liquid crystal panel 4 is employed as the light modulation device. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed.
In the embodiment, the attitude adjustment method of the optical compensation element 6 is not limited to the attitude adjustment method described in the embodiment.
For example, in the above-described embodiment, the attitude adjustment of the optical compensation element 6 is performed while checking the projected image on the screen. However, the present invention is not limited thereto, and the attitude adjustment light beam emitted from the prism 37 is a CCD camera or the like. Alternatively, a method of performing posture adjustment while directly detecting may be adopted.

本発明は、プレゼンテーションやホームシアター等に用いられるプロジェクターに利用できる。   The present invention can be used for projectors used in presentations, home theaters, and the like.

1・・・プロジェクター、4・・・液晶パネル(光変調装置)、41・・・第1の液晶パネル、42・・・第2の液晶パネル、6・・・光学補償素子、7・・・調整部材、7A・・・第1の調整部材、7B・・・第2の調整部材、8・・・支持部材、71・・・調整部材本体、72・・・腕部、73・・・操作部、83・・・第2固定部、722・・・突起部(係合構造)、731B・・・第1固定部、821〜824・・・起立部、821A〜824A・・・挿通孔(係合構造)、Ax1・・・第1の仮想線、Ax2・・・第2の仮想線。   DESCRIPTION OF SYMBOLS 1 ... Projector, 4 ... Liquid crystal panel (light modulation apparatus), 41 ... 1st liquid crystal panel, 42 ... 2nd liquid crystal panel, 6 ... Optical compensation element, 7 ... Adjustment member, 7A ... first adjustment member, 7B ... second adjustment member, 8 ... support member, 71 ... adjustment member body, 72 ... arm part, 73 ... operation Part, 83 ... second fixing part, 722 ... projection part (engagement structure), 731B ... first fixing part, 821 to 824 ... standing part, 821A to 824A ... insertion hole ( Engagement structure), Ax1... First imaginary line, Ax2.

Claims (5)

入射した光束を変調する光変調装置と、
前記光変調装置を介した光束の位相差を補償する光学補償素子と、
前記光学補償素子が取り付けられ、前記光学補償素子の位置を調整する調整部材と、
前記調整部材を支持する支持部材とを備え、
前記調整部材は、
互いに離間する方向に突出する一対の腕部を有し、
前記支持部材は、
前記一対の腕部の先端にそれぞれ対向する一対の起立部を有し、
前記腕部及び前記起立部のいずれか一方には、
いずれか他方に向けて突出する突起部、及び前記突起部が挿通される挿通孔を有し、前記挿通孔に前記突起部が挿通された状態で前記支持部材に対して前記調整部材を回転可能とする係合構造が設けられている
ことを特徴とするプロジェクター。
A light modulation device that modulates the incident light beam;
An optical compensation element that compensates for a phase difference of a light beam via the light modulation device;
An adjustment member to which the optical compensation element is attached and adjusts the position of the optical compensation element;
A support member for supporting the adjustment member,
The adjustment member is
Having a pair of arms projecting away from each other,
The support member is
A pair of upright portions respectively facing the tips of the pair of arms,
In either one of the arm part and the standing part,
It has a protrusion protruding toward the other and an insertion hole through which the protrusion is inserted, and the adjustment member can be rotated with respect to the support member in a state where the protrusion is inserted into the insertion hole. A projector characterized in that an engagement structure is provided.
請求項1に記載のプロジェクターにおいて、
前記一対の起立部は、
前記挿通孔に前記突起部が挿通された状態で弾性変形しながら前記一対の腕部にそれぞれ当接する
ことを特徴とするプロジェクター。
The projector according to claim 1.
The pair of upright portions are
The projector according to claim 1, wherein each of the projections is in contact with the pair of arms while being elastically deformed in a state where the projection is inserted into the insertion hole.
請求項1または請求項2に記載のプロジェクターにおいて、
前記光変調装置は、
液晶分子の配列状態を変化させることで入射した光束を変調する第1の液晶パネル及び第2の液晶パネルを備え、
前記第1の液晶パネルは、
前記第2の液晶パネルに対して、前記液晶分子のねじれ方向が異なる方向に設定され、
前記調整部材は、
前記第1の液晶パネルにおける前記液晶分子のねじれ方向に対応した第1の仮想線に沿って突出する前記一対の腕部を有し、前記第1の仮想線を中心として前記支持部材に対して回転可能とする第1の調整部材と、
前記第2の液晶パネルにおける前記液晶分子のねじれ方向に対応した第2の仮想線に沿って突出する前記一対の腕部を有し、前記第2の仮想線を中心として前記支持部材に対して回転可能とする第2の調整部材とを備え、
前記支持部材は、
前記第1の調整部材及び前記第2の調整部材における各前記一対の腕部の先端にそれぞれ対向する4つの前記起立部を有する
ことを特徴とするプロジェクター。
The projector according to claim 1 or 2,
The light modulation device comprises:
Comprising a first liquid crystal panel and a second liquid crystal panel that modulate the incident light beam by changing the alignment state of the liquid crystal molecules;
The first liquid crystal panel is
The twist direction of the liquid crystal molecules is set to a different direction with respect to the second liquid crystal panel,
The adjustment member is
The first liquid crystal panel has the pair of arm portions projecting along a first imaginary line corresponding to a twist direction of the liquid crystal molecules in the first liquid crystal panel, and the support member is centered on the first imaginary line. A first adjustment member that is rotatable;
The second liquid crystal panel has the pair of arm portions projecting along a second imaginary line corresponding to a twist direction of the liquid crystal molecules, and the support member is centered on the second imaginary line. A second adjustment member that is rotatable,
The support member is
4. The projector according to claim 1, wherein the projector includes four upright portions respectively opposed to tips of the pair of arm portions in the first adjustment member and the second adjustment member.
請求項1から請求項3のいずれかに記載のプロジェクターにおいて、
前記調整部材は、
調整部材本体と、前記調整部材本体から突出する前記一対の腕部と、前記調整部材本体から突出し、外部から操作される操作部とを備え、
前記操作部は、
前記光学補償素子の位置が調整された後、前記支持部材に固定される
ことを特徴とするプロジェクター。
The projector according to any one of claims 1 to 3,
The adjustment member is
An adjustment member main body, the pair of arm portions protruding from the adjustment member main body, an operation portion protruding from the adjustment member main body and operated from the outside,
The operation unit is
After the position of the optical compensation element is adjusted, the projector is fixed to the support member.
請求項4に記載のプロジェクターにおいて、
前記操作部は、
前記調整部材本体から鉛直軸に沿って上方に突出する形状を有し、
前記操作部には、
鉛直軸に略直交して張り出す第1固定部が形成され、
前記支持部材には、
鉛直軸に略直交して張り出し、前記第1固定部に対向する第2固定部が形成され、
前記第1固定部及び前記第2固定部は、
互いに接着固定される
ことを特徴とするプロジェクター。
The projector according to claim 4,
The operation unit is
Having a shape projecting upward along the vertical axis from the adjustment member body,
In the operation unit,
A first fixing portion is formed that projects substantially perpendicular to the vertical axis;
In the support member,
A second fixing portion that protrudes substantially perpendicular to the vertical axis and faces the first fixing portion is formed,
The first fixing part and the second fixing part are:
A projector characterized by being bonded and fixed to each other.
JP2011052764A 2011-03-10 2011-03-10 projector Active JP5790037B2 (en)

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